Jason Outenreath Posted March 22, 2010 Share Posted March 22, 2010 I was importing footage from this camera for the first time the other day, and noticed that despite the files being 1920x1080 24p images, that supposedly record 35mbps, the files were unusually small. For example, a 2 minute scene would be about 700mb. I was wondering if it's just a really efficient codec? Or lossy one? Or I'm doing something wrong. Thanks. Link to comment Share on other sites More sharing options...
Chris Millar Posted March 22, 2010 Share Posted March 22, 2010 Thats 4:2:0 for ya ... Now try recording the same scene and duration in 720p and look at the file size - that's the real mind boggler Link to comment Share on other sites More sharing options...
Premium Member John Sprung Posted March 22, 2010 Premium Member Share Posted March 22, 2010 Actually, 4:2:0 is only 25% better than 4:2:2. Most of the compression in this format comes from it being long GOP. I haven't been able to find out if this camera is giving you 8 or 10 bits out, but assuming 8 since they don't say, your uncompressed two minutes would be about 72 Giga bits, or 9 Giga Bytes. Long GOP gets you the best picture in the least bits, but it takes some extra effort to edit. -- J.S. Link to comment Share on other sites More sharing options...
Premium Member Adrian Sierkowski Posted March 22, 2010 Premium Member Share Posted March 22, 2010 sometimes it's just best to say well it works and I like the images. Just food for thought. Link to comment Share on other sites More sharing options...
David Williams Posted March 23, 2010 Share Posted March 23, 2010 I've read Juan Martinez from Sony confirm 10bit from HD-SDI, full 10bit, not padded 8bit. You also have to really try very hard to intentionally break the XDCAM EX mpeg2 codec in acquisition. Generational edits and heavy post will produce quantisation banding and build on the inherent mosquito noise though of course, so transcode to something more suitable. Link to comment Share on other sites More sharing options...
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